抄録
The purpose of this study is to compare characteristics of flight motion between straight flapping motion and natural one. In order to understand the basis of lift and thrust generation, the finite difference method based on the ALE method is employed. Computation are performed for various flapping and feathering phase angles between the move like drawing figure-eight and straight translation motions. Time history of the unsteady force compared each other. Moreover, we survey the effect of Re, flapping frequency, feathering angle on fluid force in two flapping type.
